Centrifugal, turbine, and similar pump.



suLzBRf CBNTRIFUGAL, TURBINE, AND SIMILAR PUMP.

APPLICATION FILED MAR. 28, 1910.

Patented Apr. 25, 1911 www@ 2 SHEETS-SHEET l.

AV y illf G.' SULZER. 1 GENTRIPUGAL, TURBINB, AND SIMILAR PUMP.

APPLICATION FILED MAR. 28, 1910v Patented Apr. 25, 1911.

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i o all whom itam/ay concern:

l season UNHCR@ @A a'r i o.)

OF NEW YORK,'N. Y., A CORPORATION OF NEW JERSEY.

GENTRIFUGAL, romains, AND sns/11min PUMP.

Be it 'known that 1, GEORG SULZER, a citizen of Switzerland, residing atHarrison, county of Hudson, and State of New Jersey, have inventedcertain new and useful Improvements in Centrifugal, rPurbine, andSimilar Pumps, fully described and -represented in the followingspecification and the accompanying drawingyforming a part of the same.

This invention relates to an improved construction for centrifugal',turbine` or similar pumps of that typeknown as multi-rotor' pumps, inwhich a number of impellers are arranged side-byside and operate inparallel, as distinguished from multi-stage pumps in which the impellersoperate in series, the especial object of the invention being tosimplify and cheapen the manufacture of such pumps while securing largecapacity and high efficiency.

The invention is especially intended for pumps having small impellers,so that the latter can be run at a very high rate of speed, as,for-instance, when the impellers.

are directly connected to a steam turbine or other high speed motor, butmay be used with impellers of any size.

The invention consists in various features of construction andcombination of parts,I

as fully described and particularly claimed hereinafter.

' In the accompanying drawings forming part of this specication, theinvention is illustratedas applied in preferred forms in a pump havingvolute diffusing chambers and aA pump having diffusing vanes, and

these constructions will now be' described in detail and the featuresformlng the .1nvention then specifically pointed out in the claims.

In the drawings, Figure 1 is a central, longitudinal section of a pumpwith diffusing chambers. Fig. 2 is a cross section on the line 2 ofFig. 1. Fig. 3 is a central, longitudinal section of the casing. Fig. L1is a View similar to Fig. 1 showing a pump with diffusing vanes. Fig. 5is a cross sectionv of the pump shown in Fig. 4, the section being takenone-half through a delivery section and one-half through a srctionsection. Fig. 6 is a central longitudinal section of the casing of Figs.t and 5.

Referring now particularly to Figs. 1, E

Specification of Letters Patent.

and A is a cylindrical casing having-0n Patented Apr. 25, 1911.

Application filed March 28, 1910. Serial No. 551,964.

-GEORG SQLZER, OF HARBISON,-`NEW JERSEY, ASSIGNOR TO HENRY R..WORTHINGTON, v

the side the suction connection B and de- 4' livery connection C for thesuction and discharge pipes, and open at the ends. to receive the heads,D by. which the. pump casing is.closed and all the parts of the pumpVsecured together. The casing A has interior ribs 10 the inner surfacesof vwhich receive the outer edges of the pump sectionsso that thesections may readily be inserted and removed and proper joints formedwithout finishing the whole inner surface ofthe cylinder. Across thesuction anddelivery the ribs 10 are preferably connected impairs by.webs 11, 12, the webs 11 forming guides for the liquid tothe suctions fthe respective impellers, and the webs 12 forming similar guides for theliquid from the diusing chambersto the delivery, these. ides securingthe proper flow of the liquid and.`

increasing the efficiency of the pump. Within the casing A are arrangedimpellers F, three impellers being shown, these impellers being carriedby shaft G, and being of the double suction type, that is, providedwith,

suction openings on opposlte sides. Outside the impellers are thediffusing chamber sections H' through which .the impellers deliver,t-hese being shown as formed to `pro vide the usual volute diffusingchambers 13 and between these delivery or diffusing sections are suctionand partition sections I, which have walls 14 extending inward tosleeves on the shaft G and dividing the-adjacent suction chambers andpassages, 15 of the successive impellers. These suction sec-V tions areformed with side shoulderswhich form running joints-,1, with ltheimpellers, the running joints 1 for the outer sides of the -endimpellers being formed by 'similar shoulders lon the heads D. 'Thesedifusin chamber sections H and partition sections? are preferably formedwith interlocking shoulders as shown, so asto form tight joints whenpressed together, and arenished on their outer surfaces 4sc as to formproper joints with the surfaces on the innerV edges of the ribs 10, thesections I being preferably provided with side shoulders 2 finished toengage the ribs 10 so that the whole outer surface of the section neednot be finished. The suction sections I have interior Walls 3 inclosingthe suction passages 15 and extending upward from the opposite sides ofthe suction B, these walls 3 extending Aabout the impeller suctions andforming, as shown, the

common double volute chamber about the y impeller suctions. The suctionpassages 15 are all formed in the sections I, except the suctionpassages for the outer side ofthe end impellers which are formedin theheads D, the passages in the heads being provided with Walls 3 of thelsame form as in the sections I. Y

The method of assembling the parts vwill readily be understood from lthedrawings, the impellers, delivery or diffusing chamber sections, andsuction or partition sections being assembled on the shaft and insertedin the casing A, and the pump heads and all the parts being securedtogether within the casing by the bolts 5 passing through the heads andpump sections, as shown clearly in Figs. 1 and 2. 'l

The casingv A obviously may be used with I different impellers, it'beingnecessary 'only to change the other parts according to the impellersused, the casings remaining,v unchanged. Thisvprovi'des a standardcasing which may be used in making up pumps for different. conditions.

Referring now to Figs. 4, 5 and.6, in which the invention is shown asapplied in connection with a turbine pump employing diffusing vanes, thegeneral arrangement of the parts and the'form of the casing issubstantially'the same 'as in the construction shown in Figs. l to 3,except as modified for useof the diffusing ringsshown. In place of thevclute'diffusing chambers H, however, diii'usion rings Kare insertedbetween the suction sections I and between the end suction sections andthe' heads, these diffusion rings having diiusing vanes a, which may beof any suitable form, and are shown as of a well known type. Thediffusion rings K in this construction form the delivery sections andare held in place by, and make tight `joints with, the suction sectionsand heads, the parts being provided with shoulders for this purpose,asin the construction previously described. In this construction,however, an inner casing 16 is used, extending about and inclosing thepump sections, this casing being formed integral with the 'outer casingand vhaving downwardly extending walls 17 running longitudinally of thepump and merging into' the outer casing at the opposite sides ofvsusction B and forming suction chamber 18 for theimpellers, and thisinner casing 16 also has downwardly extending walls 19 runningtransversely to the pump and forming delivery chambers or passagesextending through the suction portion of the pump, forming continuationsof the delivery chamber 2O surrounding the casing 16.. The casing 16 hasopenings 4 opposite the diiusing passages between thevanes a, throughwhich therein, delivery sections surroundi'n 'openings 4 the liquidpasses from the diftion sections I and form continuations of the sidewalls 17 on the casing, as shown in Fig. 5. rIhe ribs 10 with theirfinished surfaces Vare formed on the inside of the inner casing 16, andthese ribs form bearing surfaces for and joints with the'linishedsurfaces on the outer edges of the suction seCtiOnsI, as in theconstruction previously described. y

`The parts of the pump shown in Figs.v 4 to 6 are assembled and securedtogether'in the same manner as in the pump shown in Figs. 1 to 3, andthe casing may be used with different impellers, as in the constructionpreviously described, it being necessary only to change the diffusionrings according to the impellers used.

It will be understood that the invention is not to be limited to theexact form or arrangement of parts in either of the construe tionsshown, but that modications may be made therein while retaining theinvention defined by the claims.

1. In a centrifugal or similar pump, a cylindrical open ended casinghaving suction and delivery connections on the side, in i combinationwith a plurality of impellers said impellers, suction sections betweensaid delivery sections forming suction passages for cylinder ends, andmeans for securing the pump 'sections and heads together within the"casing.

2. In a centrifugal or similar pump, a cylindrical openrpended casinghaving suction and 'delivery'connections on Y, one side, incombinationwith a plurality of double suction impellers therein, delivery sectionssurrounding said impellers, suction sections between said deliverysections foi-'min suc- 4successive impeliers, pump heads closing thetion passages for adjacent suctions oI successive impellers,

pump heads closin the cylinder ends and g providing suction passages forthe outer sides of the end impellers,

and means for securing the pump sections and heads together within thecasing.

3. In acentrifugal or similar pump, a cylindrical open ended casinghaving suction and delivery connections on the side, in combination witha plurality of double suction impellers therein, delivery sectionssurround ing said impellers, suction sections between said deliverysections forming suction pas-l sages for adjacent suctions of successiveimpellers, pump heads closing the cylinder ends and providing suctionpassages for the outer sides of the end impellers, and means forsecuring' the pump sections and heads together within the casing, saidcasing havleo . impellers therein,

ing formed integral therewith walls dividing the suction and forcechambers of the pump and walls forming delivery passages extendingthrough the suction chamber.

4. In a centrifugal or similar pump, a cylindrical open en' edV casinghaving suction and delivery connections on the side, in combination witha plurality of double suction diffusion sect-ions sur'- roundinv saidimpellers having diffusing vanes with diiusing passages between them,suction sections between said diffusion sections forming suctionpassages for adjacent suctions of successive impellers, pump heads forclosing the cylinder ends, said casing having integral therewith aninner casing surrounding the pump sections and formed with openingsopposite the diffusing passages and walls dividing the suction an forcechambers of the pump and `forming delivery passages extending throughthe suction chamber.

5. In a centrifugal or similarv pump, a pump casing having suction anddelivery connections at terior walls dividing the casing into a suctionchamber of substantially the width of the suction inlet and extendingthrough the length of the casing and a ldelivery chamber for a arallelwith the casing, and having interior walls forming delivery passages forthe' impellers extending through the suction chamber.

6. In a centrifugal or similar pump, a pump -casing having suction anddelivery connections at opposite sides and having interior wallsdividing the casing-into a suction chamber of substantially the width ofthe suction inlet and extending through the length of the casing andadelivery chamber for a plurality of impellers and ha ving' interiorWalls forming delivery passages ex,- tending through the suctionchamber, in combination with a plurality of impellers and pump sectionstherein, and heads closing the opposite ends of said casing. A

7. A centrifugal pump casing consisting ot' an open ended cylinderhaving suction and delivery connections at opposite sides, and havinginterior walls dividing t-he casopposite sides and having 1n-' pluralityoi' impellers operating ining into a suction and a delivery chamber fora plurality of impellers operating in parallel within said casing.

8. ln a centrifugal or similar pump, a pump casing consisting o an openende cylinder having suction and delivery con\ nections at oppositesides, and having interior Walls dividing the casing into a suction anda delivery chamber for a plurality of impellers, in combination with aplurality of double'suction impellers operating in parallel within saidcasing, and heads closing the opposite ends of the casing.

9. A centrifugal or similar pump compris ing in combination a pluralityof double suction impellers constructed to operate in parallel, a casinghaving supply passages for said impellers and having also a singledischarge chamber inclosing all of said im pellers, diiuser's locatedbetween said impellers and discharge chamber and arranged to receive thedischarge from said impellers radially and to deliver said dischargeradi ally into said discharge chamber, said casing being adapted toreceive interchangeably impellers and diffusers of different design andwith the impellers of different diameters to suit different conditions.10. A centrifugal or similar pump comprising in combination a shaft, aplurality of double suction impelle'rs thereon, and a casing havingsupply passages for said impellers and a single discharge chamber forsaid impellers and having, between said impellers and discharge chamber,diffuser passages arranged to receive radially discharge from saidimpellers and to deliver such discharge radially into said dischargechamber, said'casing having a free space outside of said diffuserpassages to receive such discharge and adapted to receiveinterchangeably4 impellers and diiiusers o ferent design and with theimpellers of different diameters to suit 'different conditions. Intestimony whereof, I have hereunto set my hand, in the presence of twosubscribing C. J. SAWYER.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Yatents,

Washington, D. C.

